LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

GH 60

M.Sc. DEGREE EXAMINATION – CHEMISTRY

FOURTH SEMESTER – APRIL 2008

    CH 4952 – NUCLEAR & SOLID STATE CHEMISTRY

 

 

 

Date : 05/05/2008            Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

PART – A

Answer ALL the questions                                                                          10 ´ 2 = 20

1. Illustrate an improper axis?
2. Give the lattice parameter of (a) orthorhombic (b) tetragonal crystal structures.
3. Mention the coordination number in (a) TiO₂ (b) CaF₂
4. What is Meisner effect?
5. What are antiferromagnetic substances? Give one example.
6. What are isotones? Give one example.
7. What are mesons? How many types are there?
8. How is ²³⁸U converted into ¹³⁹Pu?
9. Explain the use of radioisotope tracer in reaction mechanism with an example.
10. Define a Curie.

                                                                         PART – B

Answer any EIGHT questions                                                                     8 ´ 5 = 40

11. Describe the operation of glide plane.
12. Mention the information provided by single crystal analysis.
13. Write a note on (SN)_x compounds
14. Write a note on piezoelectric materials.
15. Write a note on NLO materials.
16. Discuss the characteristics of binding energy curve.
17. How are the positron emission and electron capture differentiated?
18. Write a note on scintillation counters.
19. Explain the principle and function of cyclotron.
20. How is neutron activation analysis carried out? Mention its application.
21. What is NQR? How is it useful in the study of structure of compounds?
22. Write a note on graphite intercalation compounds.

PART – C

Answer any FOUR questions                                                                      4 ´ 10 = 40

23. Discuss the structure of YCu₂Ba₃O_7-x. What is BCS theory?
24. Describe the following operation (a) inversion (b) reflection  (c) screw axis.
25. Discuss the photoelectrolysis of water using TiO₂ and SrTiO₃.
26. Discuss the allowed and forbidden β – particle emission from the nucleus.
27. Derive the binding energy expression from liquid drop model.
28. Discuss the fission yield curve and energy involved in nuclear fission reactions.

 

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